The writing process for the majority of Metallicaâs albums have followed the same process. A large slew of guitar riffs written primarily by James Hetfield, sometimes Kirk Hammett, and rarely the bandâs bass player, (that now being bass virtuoso Robert Trujillo) are reviewed and selected.
1 Delhi is most polluted city in the world in PM2.5 concentrations. 2  Half of the top 20 most polluted cities were in India, according to data.  PM2.5 is considered most harmful to health.
The U.S. has some terribly polluted places. But itâs safe to say thereâs nothing here to the level of Agbogbloshie, in Ghana, the worldâs second biggest electronic waste dump. Or Kalimantan, in Borneo, where mercury vaporsâthe byproduct of gold miningâfill the air.